PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
In a laboratory investigation, two carts collide on a nearly frictionless track. The total kinetic energy just before the collision is measured to be 2.0J, and the total kinetic energy just after the collision is measured to be 1.8J. Which statement most strongly supports the correct classification of the collision?
(a) Because the carts did not stick together, the collision must be elastic.
(b) Because kinetic energy decreased, total momentum also decreased, making the collision inelastic.
(c) Because the total kinetic energy decreased while momentum remained conserved, the collision is inelastic but not perfectly inelastic.
(d) Because the 0.2J loss of kinetic energy is small, the collision can be treated as elastic.